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| author | Rich Felker <dalias@aerifal.cx> | 2014-12-05 21:19:39 -0500 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2014-12-05 21:19:39 -0500 |
| commit | 8f7bc690f07e90177b176b6e19736ad7c1d49840 (patch) | |
| tree | 06f4886843fe4f623a6d5ca7dec851434d7d7170 /src/process | |
| parent | 1c12c24364d1058ffdbb28fca72a51de85082778 (diff) | |
| download | musl-8f7bc690f07e90177b176b6e19736ad7c1d49840.tar.gz musl-8f7bc690f07e90177b176b6e19736ad7c1d49840.tar.xz musl-8f7bc690f07e90177b176b6e19736ad7c1d49840.zip | |
use direct syscall rather than write function in posix_spawn child
the write function is a cancellation point and accesses thread-local state belonging to the calling thread in the parent process. since cancellation is blocked for the duration of posix_spawn, this is probably safe, but it's fragile and unnecessary. making the syscall directly is just as easy and clearly safe.
Diffstat (limited to 'src/process')
| -rw-r--r-- | src/process/posix_spawn.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/process/posix_spawn.c b/src/process/posix_spawn.c index af127317..0bdf71cd 100644 --- a/src/process/posix_spawn.c +++ b/src/process/posix_spawn.c @@ -136,7 +136,7 @@ static int child(void *args_vp) fail: /* Since sizeof errno < PIPE_BUF, the write is atomic. */ ret = -ret; - if (ret) while (write(p, &ret, sizeof ret) < 0); + if (ret) while (__syscall(SYS_write, p, &ret, sizeof ret) < 0); _exit(127); } |